Problems converting magix movies to dvd

Hi all, im hoping someone can help me. I have made a movie using magix movie maker pro, and have used a firewire card to capture the film with.

I tried using the dvd creating sofware with the programme, but when it has burnt the dvd it doesnt play properly and keeps jumping when you watch it. So i tried converting it and then making a dvd in another programme.

So i converted it to a windows media export and made a dvd from the file - that seemed ok, but the quality of the video is no way near as good it was if i just plug my camcorder straight into the tv.

I dont know where im going wrong, or why when i convert the movie it loses its quality.

Have you checked the quality of the burn in something like Nero CD-DVD speed test just to make sure you haven't got a faulty disc. and see what UDF standard it is using, from memory I think UDF 1.02 is most compatible with the older DVD players, someone please correct me if I'm wrong.
Bryan